A.The isolation band can be filled with 40G DQPSK wavelength or 40G ODB wavelength

B.In order to avoid rerouting into the isolation band, the optical layer ASON prohibits 10G and coherent mixed optical layer ASON

C.The mixed transmission cost is related to the number of transmission spans, the width of the isolation band, and the FEC encoding method

D.The coherent signal starts from the long wavelength, and 10G starts from the short wavelength, with an isolation band in between

A.FALSE

B.TRUE

A.Generate the time slot optimization plan in AMS5000 according to the optimization principle, and write the implementation plan.

B.Data collection and production optimization plan: Consistency verification of the customer's network management network element data, fiber and cable connection, and path data across the entire network: and process the deactivation business in the network, and confirm the one-way business in the network.

C.Clean up discrete services before time slot optimization, delete junk services, and confirm with customers to complete or delete and reconstruct defective services.

D.Analyze the resource evaluation report, focus on low-level crossover resources and line time slot utilization, focus on the location of bottlenecks, and confirm the principle of routing time slot optimization with customers.

A."Main and standby channel difference threshold (dB)" One is used to set the signal failure (SF) when the difference in optical power between the main and standby optical ports of a single board reaches a certain value.

B.When the difference between the main and standby optical power exceeds the threshold, the optical switch will switch the service to the standby channel, and the set value supports query. The recommended setting is 5db.

C.If the current optical power difference between the main and backup channels exceeds the "main and backup channel difference threshold (dB)", the system will undergo protection switching.

D."Initial difference between the main and backup channels (dB)"-used to set the reference value of the optical power difference between the main and backup channels of the board.

A.When the fiber interruption is repaired and the IPA cannot be terminated, it may be because the IPA protection group is not configured with the "detection board", only the auxiliary detection board is configured, and the auxiliary detection board reports an alarm that triggers IPA

B.After the IPA function is successfully activated, when the amplifier board detects LOS, the optical power of its output port becomes safe optical power

C.Select "Configuration/IPA Management" in the function tree of the NE Manager to configure the IPA start delay value

D.IPA function is only applicable to Raman amplifiers, not to ordinary amplifiers

E.The purpose of testing the IPA function is to verify that if any fiber is broken in the fiber path included in the IPA, the amplifier included in the IPA can be turned off. After the fiber is restored, the amplifier can be automatically turned on, and The power change is within 0.5dB.